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MXCS Architecture Overview
SQL/MX Connectivity Service Administrative Command Reference—526350-005
1-5
Software Installation
Error messages describe the problem and, where possible, suggest a recovery
action.
Software Installation
MXCS administrative commands are installed as part of MXCI. No special installation
process is needed to install software for these commands.
Starting, Leaving, and Ending MXCI
The MXCI command has many options. One of them enables you to specify the name
of a command file. For start-up information, see MXCI Mode Command on page 2-12.
For examples, see Example Commands and Objects on page A-1
Complex System Configuration
This subsection describes a complex MXCS configuration on one system, showing the
objects that MXCS administrative commands manage: service, server, DS, and EVAR.
In Figure 1-2 on page 1-6, a system is shown with three of its CPUs represented and
MXCS objects distributed across these CPUs. The service object is a logical entity
consisting of two processes, one or more DS instances, a table of all servers it has
started and owns, and memory-resident copies of EVARS owned by each DS instance.
Data sources exist in three places in three forms:
A copy on the disk that has no state except existence or not
A copy in the service, the DS instance, that has a state (stopped is default state)
A partial copy kept in each server
The configuration server in each service reads all DS instances at service start-up and
keeps them current. However, states for DS instances can be different in different
services. The association server starts each server and passes its DS attributes at
server start-up and also when certain attributes change. However, when an EVAR for a
DS instance is added, deleted, or changes value, it is not passed to connected servers
because this action changes the environment during transactions. EVARs pass from a
DS instance to a server only when that server starts or goes idle. Some DS attributes
are never passed to the servers. For example, only the association server uses the
maximum number of servers permitted.
In this configuration, two services are running: Service A on CPU 5 and Service B on
CPU 9. The SQL/MX database engine contains the configuration database for the
permanent ODBC configuration information (DS and EVAR definitions). Note that CPU
11 has no MXCS service running on it, but it does have a server object. Also, one
instance of MXCI is running on one of the CPUs, which is not specified as it does not
matter for this discussion.
On CPU 5, Service A is a logical entity consisting of an association server and a
configuration server. All three DS definitions are read from the disk and kept current in
- SQL/MX Connectivity 1
- Service Administrative 1
- Command Reference 1
- Document History 2
- Legal Notices 3
- SQL/MX Connectivity Service 5
- Administrative Command 5
- Reference 5
- 3. Object Service Commands 6
- 4. Object Server Commands 6
- 5. Object DS Commands 6
- 6. Object EVAR Commands 7
- 7. Object User Commands 7
- Example Commands and Objects 8
- What’s New in This Manual 10
- New and Changed Information 10
- About This Manual 11
- Related Documentation 12
- Notation Conventions 14
- General Syntax Notation 15
- Notation for Messages 16
- Change Bar Notation 18
- 1 MXCS Architecture Overview 19
- Architecture Overview 20
- MXCS Architecture Overview 21
- User Interface With MXCI 22
- General Features 22
- Software Installation 23
- Complex System Configuration 23
- Error Message Overview 25
- 2 MXCS Commands and Objects 29
- MXCS Object Types 30
- Command Termination 31
- Fields or Tokens in Commands 32
- Command Syntax Case 33
- Object Name Components 33
- MXCS Commands and Objects 34
- DS Name and EVAR Name 35
- Default Object Name 35
- Command Size Limit 36
- Empty Quoted Strings 36
- Command Caveats 37
- Security 38
- Example MXCS Configuration 38
- Related Commands 39
- MXCI Mode Command 40
- Session Variables 40
- MXCI Comment 40
- 3 Object Service Commands 41
- INFO SERVICE 42
- Examples—INFO SERVICE 43
- START SERVICE 44
- STOP SERVICE 45
- Considerations—STOP SERVICE 46
- Example—STOP SERVICE 46
- VERSION SERVICE 47
- Object Service Commands 48
- Example—VERSION SERVICE 48
- 4 Object Server Commands 49
- INFO SERVER 50
- Considerations—INFO SERVER 51
- Output Report—INFO SERVER 51
- Example—INFO SERVER 51
- Object Server Commands 52
- STOP SERVER 53
- Example—STOP SERVER 54
- 5 Object DS Commands 55
- TMD_Default_DataSource" 56
- Object DS Commands 57
- Considerations—ADD DS 60
- Examples—ADD DS 61
- ALTER DS 62
- Considerations—ALTER DS 66
- Examples—ALTER DS 66
- DELETE DS 68
- Example—DELETE DS 69
- Considerations—INFO DS 71
- Examples—INFO DS 71
- START DS 74
- Considerations—STOP DS 76
- Examples—STOP DS 76
- 6 Object EVAR Commands 77
- EVAR Order 78
- ADD EVAR 79
- Considerations—ADD EVAR 80
- Example—ADD EVAR 80
- ALTER EVAR 82
- Considerations—ALTER EVAR 83
- Example—ALTER EVAR 84
- DELETE EVAR 85
- Considerations—DELETE EVAR 86
- Example—DELETE EVAR 86
- INFO EVAR 87
- Considerations—INFO EVAR 88
- Example—INFO EVAR 88
- Object EVAR Commands 90
- 7 Object User Commands 91
- ADD USER 92
- ALTER USER 93
- DELETE USER 94
- INFO USER 95
- Object User Commands 96
- Considerations—INFO USER 96
- This example stops the DS: 100
- TACL prompt by entering: 100
- Special Characters 103
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